diff --git a/.eslintrc.js b/.eslintrc.js
index 7243df99a8..5aa1cdf132 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -6,6 +6,7 @@
  *
  * @format
  */
+
 'use strict';
 
 module.exports = {
diff --git a/flow-typed/console.js.flow b/flow-typed/console.js.flow
index 3f96f84678..d2df334e87 100644
--- a/flow-typed/console.js.flow
+++ b/flow-typed/console.js.flow
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 declare module 'console' {
diff --git a/packages/metro-babel-register/src/babel-register.js b/packages/metro-babel-register/src/babel-register.js
index 2b2a446ae2..923d71107d 100644
--- a/packages/metro-babel-register/src/babel-register.js
+++ b/packages/metro-babel-register/src/babel-register.js
@@ -6,6 +6,7 @@
  *
  * @format
  */
+
 'use strict';
 
 const escapeRegExp = require('escape-string-regexp');
diff --git a/packages/metro-babel-transformer/src/index.js b/packages/metro-babel-transformer/src/index.js
index 85c4b4cd82..1ab376849b 100644
--- a/packages/metro-babel-transformer/src/index.js
+++ b/packages/metro-babel-transformer/src/index.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 const {parseSync, transformFromAstSync} = require('@babel/core');
diff --git a/packages/metro-config/src/defaults/blacklist.js b/packages/metro-config/src/defaults/blacklist.js
index d694557a12..30570ec25d 100644
--- a/packages/metro-config/src/defaults/blacklist.js
+++ b/packages/metro-config/src/defaults/blacklist.js
@@ -6,6 +6,7 @@
  *
  * @format
  */
+
 'use strict';
 
 var path = require('path');
diff --git a/packages/metro-config/src/defaults/defaults.js b/packages/metro-config/src/defaults/defaults.js
index 984cba4494..37fab2ec3a 100644
--- a/packages/metro-config/src/defaults/defaults.js
+++ b/packages/metro-config/src/defaults/defaults.js
@@ -7,6 +7,7 @@
  * @flow strict
  * @format
  */
+
 'use strict';
 
 const defaultCreateModuleIdFactory = require('metro/src/lib/createModuleIdFactory');
diff --git a/packages/metro-config/src/defaults/validConfig.js b/packages/metro-config/src/defaults/validConfig.js
index 9732397737..17c8839c26 100644
--- a/packages/metro-config/src/defaults/validConfig.js
+++ b/packages/metro-config/src/defaults/validConfig.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 module.exports = (async () => {
diff --git a/packages/metro-config/src/oldConfig.js b/packages/metro-config/src/oldConfig.js
index a72a99eed0..d5a50082cf 100644
--- a/packages/metro-config/src/oldConfig.js
+++ b/packages/metro-config/src/oldConfig.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 const blacklist = require('./defaults/blacklist');
diff --git a/packages/metro-core/src/__tests__/Logger-test.js b/packages/metro-core/src/__tests__/Logger-test.js
index 33900ec6a4..8ac3a51c41 100644
--- a/packages/metro-core/src/__tests__/Logger-test.js
+++ b/packages/metro-core/src/__tests__/Logger-test.js
@@ -8,6 +8,7 @@
  * @emails oncall+js_foundation
  * @flow strict-local
  */
+
 'use strict';
 
 const {
diff --git a/packages/metro-minify-uglify/__tests__/minify-test.js b/packages/metro-minify-uglify/__tests__/minify-test.js
index 6b27663d7e..926b27cf03 100644
--- a/packages/metro-minify-uglify/__tests__/minify-test.js
+++ b/packages/metro-minify-uglify/__tests__/minify-test.js
@@ -8,6 +8,7 @@
  * @format
  * @emails oncall+js_foundation
  */
+
 'use strict';
 
 import type {BasicSourceMap} from 'metro-source-map';
diff --git a/packages/metro-react-native-babel-preset/src/configs/hmr.js b/packages/metro-react-native-babel-preset/src/configs/hmr.js
index c7ee7723ed..53d0f3d4ef 100644
--- a/packages/metro-react-native-babel-preset/src/configs/hmr.js
+++ b/packages/metro-react-native-babel-preset/src/configs/hmr.js
@@ -6,6 +6,7 @@
  *
  * @format
  */
+
 'use strict';
 
 module.exports = function() {
diff --git a/packages/metro-source-map/src/__tests__/composeSourceMaps-test.js b/packages/metro-source-map/src/__tests__/composeSourceMaps-test.js
index 0dd61bf056..030161af3c 100644
--- a/packages/metro-source-map/src/__tests__/composeSourceMaps-test.js
+++ b/packages/metro-source-map/src/__tests__/composeSourceMaps-test.js
@@ -8,6 +8,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 /* eslint-disable no-multi-str */
diff --git a/packages/metro-source-map/src/composeSourceMaps.js b/packages/metro-source-map/src/composeSourceMaps.js
index 47c509f0a5..48dec3f5a7 100644
--- a/packages/metro-source-map/src/composeSourceMaps.js
+++ b/packages/metro-source-map/src/composeSourceMaps.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 // eslint-disable-next-line lint/sort-requires
diff --git a/packages/metro-source-map/src/encode.js b/packages/metro-source-map/src/encode.js
index 87beeca743..926e284df2 100644
--- a/packages/metro-source-map/src/encode.js
+++ b/packages/metro-source-map/src/encode.js
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates.
+ * Portions Copyright (c) Facebook, Inc. and its affiliates.
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
diff --git a/packages/metro-source-map/src/generateFunctionMap.js b/packages/metro-source-map/src/generateFunctionMap.js
index eb007a8e54..fe665839f9 100644
--- a/packages/metro-source-map/src/generateFunctionMap.js
+++ b/packages/metro-source-map/src/generateFunctionMap.js
@@ -6,8 +6,8 @@
  *
  * @flow
  * @format
- *
  */
+
 'use strict';
 
 const B64Builder = require('./B64Builder');
diff --git a/packages/metro/src/DeltaBundler/__tests__/WorkerFarm-test.js b/packages/metro/src/DeltaBundler/__tests__/WorkerFarm-test.js
index 501844b8a1..f58b51b5bd 100644
--- a/packages/metro/src/DeltaBundler/__tests__/WorkerFarm-test.js
+++ b/packages/metro/src/DeltaBundler/__tests__/WorkerFarm-test.js
@@ -7,6 +7,7 @@
  * @emails oncall+metro_bundler
  * @format
  */
+
 'use strict';
 
 const getDefaultConfig = require('metro-config/src/defaults');
diff --git a/packages/metro/src/JSTransformer/__mocks__/worker.js b/packages/metro/src/JSTransformer/__mocks__/worker.js
index e8f91da94a..ebc6afd043 100644
--- a/packages/metro/src/JSTransformer/__mocks__/worker.js
+++ b/packages/metro/src/JSTransformer/__mocks__/worker.js
@@ -6,6 +6,7 @@
  *
  * @format
  */
+
 'use strict';
 
 module.exports = function(data, callback) {
diff --git a/packages/metro/src/JSTransformer/worker/__tests__/import-export-plugin-test.js b/packages/metro/src/JSTransformer/worker/__tests__/import-export-plugin-test.js
index 2a292290a4..f6e1258a26 100644
--- a/packages/metro/src/JSTransformer/worker/__tests__/import-export-plugin-test.js
+++ b/packages/metro/src/JSTransformer/worker/__tests__/import-export-plugin-test.js
@@ -7,6 +7,7 @@
  * @emails oncall+js_foundation
  * @format
  */
+
 'use strict';
 
 const importExportPlugin = require('../import-export-plugin');
diff --git a/packages/metro/src/JSTransformer/worker/__tests__/inline-plugin-test.js b/packages/metro/src/JSTransformer/worker/__tests__/inline-plugin-test.js
index 9cdf4b26e0..b653fe6d1d 100644
--- a/packages/metro/src/JSTransformer/worker/__tests__/inline-plugin-test.js
+++ b/packages/metro/src/JSTransformer/worker/__tests__/inline-plugin-test.js
@@ -8,6 +8,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 const inlinePlugin = require('../inline-plugin');
diff --git a/packages/metro/src/JSTransformer/worker/__tests__/worker-test.js b/packages/metro/src/JSTransformer/worker/__tests__/worker-test.js
index 2ff20451aa..763270b266 100644
--- a/packages/metro/src/JSTransformer/worker/__tests__/worker-test.js
+++ b/packages/metro/src/JSTransformer/worker/__tests__/worker-test.js
@@ -7,6 +7,7 @@
  * @emails oncall+metro_bundler
  * @format
  */
+
 'use strict';
 
 jest
diff --git a/packages/metro/src/ModuleGraph/module.js b/packages/metro/src/ModuleGraph/module.js
index ab6b501a70..b9c8320e90 100644
--- a/packages/metro/src/ModuleGraph/module.js
+++ b/packages/metro/src/ModuleGraph/module.js
@@ -7,6 +7,7 @@
  * @flow strict-local
  * @format
  */
+
 'use strict';
 
 import type {Module} from './types.flow';
diff --git a/packages/metro/src/ModuleGraph/node-haste/node-haste.flow.js b/packages/metro/src/ModuleGraph/node-haste/node-haste.flow.js
index c26c5d2e0c..7a068b4a4f 100644
--- a/packages/metro/src/ModuleGraph/node-haste/node-haste.flow.js
+++ b/packages/metro/src/ModuleGraph/node-haste/node-haste.flow.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 'use strict';
diff --git a/packages/metro/src/ModuleGraph/silent-console.js b/packages/metro/src/ModuleGraph/silent-console.js
index 42cee976b2..338d907f2a 100644
--- a/packages/metro/src/ModuleGraph/silent-console.js
+++ b/packages/metro/src/ModuleGraph/silent-console.js
@@ -7,6 +7,7 @@
  * @format
  * @flow strict
  */
+
 'use strict';
 
 const {Console} = require('console');
diff --git a/packages/metro/src/ModuleGraph/test-helpers.js b/packages/metro/src/ModuleGraph/test-helpers.js
index 59e5dc8ae2..de9d09fab5 100644
--- a/packages/metro/src/ModuleGraph/test-helpers.js
+++ b/packages/metro/src/ModuleGraph/test-helpers.js
@@ -6,6 +6,7 @@
  *
  * @format
  */
+
 'use strict';
 
 const generate = require('@babel/generator').default;
diff --git a/packages/metro/src/ModuleGraph/types.flow.js b/packages/metro/src/ModuleGraph/types.flow.js
index f61b9c22ee..eeacef312e 100644
--- a/packages/metro/src/ModuleGraph/types.flow.js
+++ b/packages/metro/src/ModuleGraph/types.flow.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 import type {Ast} from '@babel/core';
diff --git a/packages/metro/src/Server/MultipartResponse.js b/packages/metro/src/Server/MultipartResponse.js
index 7012b9b0e4..c47b33bcd3 100644
--- a/packages/metro/src/Server/MultipartResponse.js
+++ b/packages/metro/src/Server/MultipartResponse.js
@@ -6,6 +6,7 @@
  *
  * @format
  */
+
 'use strict';
 
 const CRLF = '\r\n';
diff --git a/packages/metro/src/Server/__tests__/MultipartResponse-test.js b/packages/metro/src/Server/__tests__/MultipartResponse-test.js
index e42cb589ce..c08f936d63 100644
--- a/packages/metro/src/Server/__tests__/MultipartResponse-test.js
+++ b/packages/metro/src/Server/__tests__/MultipartResponse-test.js
@@ -8,6 +8,7 @@
  * @emails oncall+js_foundation
  * @flow
  */
+
 'use strict';
 
 const MultipartResponse = require('../MultipartResponse');
diff --git a/packages/metro/src/Server/symbolicate.js b/packages/metro/src/Server/symbolicate.js
index 72ed18f3ca..492ef46cb0 100644
--- a/packages/metro/src/Server/symbolicate.js
+++ b/packages/metro/src/Server/symbolicate.js
@@ -7,6 +7,7 @@
  * @flow strict-local
  * @format
  */
+
 'use strict';
 
 const {greatestLowerBound} = require('metro-source-map/src/Consumer/search');
diff --git a/packages/metro/src/__mocks__/debug.js b/packages/metro/src/__mocks__/debug.js
index 41b21d419a..b0756bd585 100644
--- a/packages/metro/src/__mocks__/debug.js
+++ b/packages/metro/src/__mocks__/debug.js
@@ -7,6 +7,7 @@
  * @format
  * @flow strict
  */
+
 'use strict';
 
 module.exports = () => () => {};
diff --git a/packages/metro/src/__tests__/HmrServer-test.js b/packages/metro/src/__tests__/HmrServer-test.js
index 3606d9f2ac..95003098bf 100644
--- a/packages/metro/src/__tests__/HmrServer-test.js
+++ b/packages/metro/src/__tests__/HmrServer-test.js
@@ -7,6 +7,7 @@
  * @format
  * @emails oncall+js_foundation
  */
+
 'use strict';
 
 const HmrServer = require('../HmrServer');
diff --git a/packages/metro/src/assetTransformer.js b/packages/metro/src/assetTransformer.js
index 52b4ff521a..7ce3d2234f 100644
--- a/packages/metro/src/assetTransformer.js
+++ b/packages/metro/src/assetTransformer.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 const path = require('path');
diff --git a/packages/metro/src/cli.js b/packages/metro/src/cli.js
index 719b0cd0c0..6b683cbcd4 100755
--- a/packages/metro/src/cli.js
+++ b/packages/metro/src/cli.js
@@ -1,5 +1,4 @@
 #!/usr/bin/env node
-
 /**
  * Copyright (c) Facebook, Inc. and its affiliates.
  *
diff --git a/packages/metro/src/lib/RamBundleParser.js b/packages/metro/src/lib/RamBundleParser.js
index be365ea8e8..fe18691214 100644
--- a/packages/metro/src/lib/RamBundleParser.js
+++ b/packages/metro/src/lib/RamBundleParser.js
@@ -7,6 +7,7 @@
  * @format
  * @flow strict
  */
+
 'use strict';
 
 const MAGIC_NUMBER = require('../shared/output/RamBundle/magic-number');
diff --git a/packages/metro/src/lib/__tests__/addParamsToDefineCall-test.js b/packages/metro/src/lib/__tests__/addParamsToDefineCall-test.js
index cea0cffda0..1ab40767cf 100644
--- a/packages/metro/src/lib/__tests__/addParamsToDefineCall-test.js
+++ b/packages/metro/src/lib/__tests__/addParamsToDefineCall-test.js
@@ -8,6 +8,7 @@
  * @emails oncall+js_foundation
  * @flow strict
  */
+
 'use strict';
 
 const addParamsToDefineCall = require('../addParamsToDefineCall');
diff --git a/packages/metro/src/lib/bundle-modules/HMRClient.js b/packages/metro/src/lib/bundle-modules/HMRClient.js
index b5b20e6589..329ca1dfaa 100644
--- a/packages/metro/src/lib/bundle-modules/HMRClient.js
+++ b/packages/metro/src/lib/bundle-modules/HMRClient.js
@@ -7,6 +7,7 @@
  * @flow strict-local
  * @format
  */
+
 'use strict';
 
 const EventEmitter = require('eventemitter3');
diff --git a/packages/metro/src/lib/bundle-modules/__tests__/HMRClient-test.js b/packages/metro/src/lib/bundle-modules/__tests__/HMRClient-test.js
index 2fe5a89204..15f924075a 100644
--- a/packages/metro/src/lib/bundle-modules/__tests__/HMRClient-test.js
+++ b/packages/metro/src/lib/bundle-modules/__tests__/HMRClient-test.js
@@ -8,6 +8,7 @@
  * @emails oncall+js_foundation
  * @format
  */
+
 'use strict';
 
 const HMRClient = require('../HMRClient');
diff --git a/packages/metro/src/shared/output/RamBundle/as-assets.js b/packages/metro/src/shared/output/RamBundle/as-assets.js
index 520760bba9..616c9f2dc3 100644
--- a/packages/metro/src/shared/output/RamBundle/as-assets.js
+++ b/packages/metro/src/shared/output/RamBundle/as-assets.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 const MAGIC_RAM_BUNDLE_NUMBER = require('./magic-number');
diff --git a/packages/metro/src/shared/output/RamBundle/as-indexed-file.js b/packages/metro/src/shared/output/RamBundle/as-indexed-file.js
index c669dc6656..153b777b9b 100644
--- a/packages/metro/src/shared/output/RamBundle/as-indexed-file.js
+++ b/packages/metro/src/shared/output/RamBundle/as-indexed-file.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 const MAGIC_UNBUNDLE_FILE_HEADER = require('./magic-number');
diff --git a/packages/metro/src/shared/output/RamBundle/buildSourcemapWithMetadata.js b/packages/metro/src/shared/output/RamBundle/buildSourcemapWithMetadata.js
index 41b1c0733b..0356631833 100644
--- a/packages/metro/src/shared/output/RamBundle/buildSourcemapWithMetadata.js
+++ b/packages/metro/src/shared/output/RamBundle/buildSourcemapWithMetadata.js
@@ -7,6 +7,7 @@
  * @flow strict-local
  * @format
  */
+
 'use strict';
 
 const {
diff --git a/packages/metro/src/shared/output/RamBundle/magic-number.js b/packages/metro/src/shared/output/RamBundle/magic-number.js
index e0759defd5..50ad0f3347 100644
--- a/packages/metro/src/shared/output/RamBundle/magic-number.js
+++ b/packages/metro/src/shared/output/RamBundle/magic-number.js
@@ -7,6 +7,7 @@
  * @flow strict
  * @format
  */
+
 'use strict';
 
 module.exports = 0xfb0bd1e5;
diff --git a/packages/metro/src/shared/output/RamBundle/util.js b/packages/metro/src/shared/output/RamBundle/util.js
index 66e40bec8c..b780831a64 100644
--- a/packages/metro/src/shared/output/RamBundle/util.js
+++ b/packages/metro/src/shared/output/RamBundle/util.js
@@ -7,6 +7,7 @@
  * @flow strict-local
  * @format
  */
+
 'use strict';
 
 const invariant = require('invariant');
diff --git a/packages/metro/src/shared/output/RamBundle/write-sourcemap.js b/packages/metro/src/shared/output/RamBundle/write-sourcemap.js
index d763f63213..09cefbf679 100644
--- a/packages/metro/src/shared/output/RamBundle/write-sourcemap.js
+++ b/packages/metro/src/shared/output/RamBundle/write-sourcemap.js
@@ -7,6 +7,7 @@
  * @flow strict-local
  * @format
  */
+
 'use strict';
 
 const writeFile = require('../writeFile');
diff --git a/packages/metro/src/shared/output/__tests__/meta-test.js b/packages/metro/src/shared/output/__tests__/meta-test.js
index 3b4d4358ab..f7499e40f3 100644
--- a/packages/metro/src/shared/output/__tests__/meta-test.js
+++ b/packages/metro/src/shared/output/__tests__/meta-test.js
@@ -8,6 +8,7 @@
  * @emails oncall+js_foundation
  * @flow strict
  */
+
 'use strict';
 
 const meta = require('../meta');
diff --git a/packages/metro/src/shared/output/meta.js b/packages/metro/src/shared/output/meta.js
index 3ee50055e6..3054067bd7 100644
--- a/packages/metro/src/shared/output/meta.js
+++ b/packages/metro/src/shared/output/meta.js
@@ -7,6 +7,7 @@
  * @flow strict
  * @format
  */
+
 'use strict';
 
 /* global Buffer: true */
diff --git a/packages/metro/src/shared/output/writeFile.js b/packages/metro/src/shared/output/writeFile.js
index 9806584bc4..13b4dbae24 100644
--- a/packages/metro/src/shared/output/writeFile.js
+++ b/packages/metro/src/shared/output/writeFile.js
@@ -7,6 +7,7 @@
  * @flow
  * @format
  */
+
 'use strict';
 
 const denodeify = require('denodeify');
diff --git a/packages/metro/src/shared/types.flow.js b/packages/metro/src/shared/types.flow.js
index 55585f973f..30c3e4244e 100644
--- a/packages/metro/src/shared/types.flow.js
+++ b/packages/metro/src/shared/types.flow.js
@@ -7,6 +7,7 @@
  * @flow strict-local
  * @format
  */
+
 'use strict';
 
 import type {Options as DeltaBundlerOptions} from '../DeltaBundler/types.flow';
diff --git a/scripts/createSubpackage.js b/scripts/createSubpackage.js
index 462584227c..1d2a32a0eb 100644
--- a/scripts/createSubpackage.js
+++ b/scripts/createSubpackage.js
@@ -6,6 +6,7 @@
  *
  * @format
  */
+
 'use strict';
 
 const fs = require('fs');
diff --git a/scripts/mapCoverage.js b/scripts/mapCoverage.js
index e4a50b529d..92c617ba45 100644
--- a/scripts/mapCoverage.js
+++ b/scripts/mapCoverage.js
@@ -3,7 +3,6 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
  */
 
 /**
diff --git a/scripts/setupJest.js b/scripts/setupJest.js
index 1fd65e8013..5f3935e20b 100644
--- a/scripts/setupJest.js
+++ b/scripts/setupJest.js
@@ -6,6 +6,7 @@
  *
  * @format
  */
+
 'use strict';
 
 global.Promise = require('promise');